Consider affiliate marketing.

Affiliate marketing is a great way to bring in revenue without having a huge presence on the web. There are networks like ShareASale that will offer lots of items to promote and many won't require a large history online.

If you do go this route, make sure you write high-quality posts that offer in content links to the affiliate products.

Skip the banner ads, because honestly, they won't convert nearly as well as subtle links within your content.

Depending on your niche, some products will offer payouts of $200 or more per sale. In that environment, even a few sales add up quickly.